Prestretching-based graphene flexible strain sensor and preparation method thereof

Abstract

The invention discloses a prestretching-based graphene flexible strain sensor and a preparation method thereof. The prestretching-based graphene flexible strain sensor comprises a released substrate;a graphene sensitive layer is arranged on the released substrate; conductive silver adhesives are arranged at the joints of the two ends of the graphene sensitive layer and the released substrate, andelectrodes are arranged on the upper surfaces of the conductive silver adhesives. The preparation method of the prestretching-based graphene flexible strain sensor comprises the following steps: prestretching a substrate before transferring a graphene film, and completing the transferring of the graphene film through a dry transfer method, thereby preparing the graphene flexible strain sensor based on prestretching. Larger strain measurement is achieved by the sensor provided in the invention through pre-stretching, and good stability and repeatability are achieved; the manufacturing successrate is increased through a dry transfer method, the preparation method is simplified, and large-scale manufacturing is achieved.

Description

technical field [0001] The invention belongs to the technical field of flexible electronics, in particular to a pre-stretched graphene flexible strain sensor and a preparation method thereof. Background technique [0002] With the development and integration of emerging interdisciplinary disciplines and directions such as bionic electronics, biomechanics, medical engineering, new material technology, sensor technology, and robotics, flexible strain sensors have attracted the attention and research of researchers, doctors, and engineers. Traditional strain sensors are mainly based on metal and semiconductor materials, which have certain sensitivity, but the disadvantages are that the material is hard and the stretchability is poor, less than <5%, which limits the application range of traditional strain sensors. Compared with traditional strain sensors, flexible strain sensors overcome the shortcomings of hard materials and poor stretchability, and have the advantages of fl...

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Problems solved by technology

[0006] The object of the present invention is to provide a graphene flexible strain sensor based on pre-stretching, which solves the problem of low sensitivity of the graphene flexible strain sensor prepared by redox method in the prior art

[0007] Another object of the present invention is to provide a method for preparing a graphene flexible strain sensor based on pre-stretching, which solves the problem that the graphene flexible strain sensor prepared by the wet transfer method in the prior art is easily damaged during the transfer process, and the transfer is successful. Low efficiency, complicated operation, low stretchability and poor repeatability of single-layer graphene structure

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